Abstract: An engine and lift unit for rotary wing aircraft together with means for balancing of the rotational torque of the said wings is shown. The rotational torque is balanced by a blower propeller, disposed horizontally below the rotor, inside an enclosure including a vertical duct surrounding the blower propeller and whose lower open end exits under the fuselage of the aircraft. A horizontal duct opens into an intermediate zone of the vertical duct and exits out the rear of the aircraft. An adjustable shutter assembly is disposed in the junction of the two ducts allowing the creation of two adjustable air flows, one directed vertically downwards and the other directed towards the rear of the aircraft. The aircraft also has fixed wings, flaps, rudders and controls so the pilot can operate the aircraft in flight.

Abstract: Combustion engine having no connecting rods or crankshaft, whose cylinders are disposed radially. In this engine, the axes of the cylinders are situated in a plane perpendicular to the drive shaft, the alternating movement of the pistons being transmitted by rollers fixed to the said pistons, which rollers roll on a cam fixed to the engine. The movement of the pistons is transmitted via at least three cams, a central cam rotating in one direction and two lateral cams rotating at the same speed but in the opposite direction, the three cams being positioned in a manner such that the apexes of the bosses which they possess are situated in the plane of the axis of the drive shaft at top dead center.